How to use

getReadyBuf

method

in

org.apache.hadoop.hdfs.server.namenode.EditsDoubleBuffer

private void preallocate() throws IOException {
 long position = fc.position();
 long size = fc.size();
 int bufSize = doubleBuf.getReadyBuf().getLength();
 long need = bufSize - (size - position);
 if (need <= 0) {
  return;
 }
 long oldSize = size;
 long total = 0;
 long fillCapacity = fill.capacity();
 while (need > 0) {
  fill.position(0);
  IOUtils.writeFully(fc, fill, size);
  need -= fillCapacity;
  size += fillCapacity;
  total += fillCapacity;
 }
 if(LOG.isDebugEnabled()) {
  LOG.debug("Preallocated " + total + " bytes at the end of " +
      "the edit log (offset " + oldSize + ")");
 }
}

private void preallocate() throws IOException {
 long position = fc.position();
 long size = fc.size();
 int bufSize = doubleBuf.getReadyBuf().getLength();
 long need = bufSize - (size - position);
 if (need <= 0) {
  return;
 }
 long oldSize = size;
 long total = 0;
 long fillCapacity = fill.capacity();
 while (need > 0) {
  fill.position(0);
  IOUtils.writeFully(fc, fill, size);
  need -= fillCapacity;
  size += fillCapacity;
  total += fillCapacity;
 }
 if(LOG.isDebugEnabled()) {
  LOG.debug("Preallocated " + total + " bytes at the end of " +
      "the edit log (offset " + oldSize + ")");
 }
}

private void preallocate() throws IOException {
 long position = fc.position();
 long size = fc.size();
 int bufSize = doubleBuf.getReadyBuf().getLength();
 long need = bufSize - (size - position);
 if (need <= 0) {
  return;
 }
 long oldSize = size;
 long total = 0;
 long fillCapacity = fill.capacity();
 while (need > 0) {
  fill.position(0);
  IOUtils.writeFully(fc, fill, size);
  need -= fillCapacity;
  size += fillCapacity;
  total += fillCapacity;
 }
 if(LOG.isDebugEnabled()) {
  LOG.debug("Preallocated " + total + " bytes at the end of " +
      "the edit log (offset " + oldSize + ")");
 }
}